Mount Prospect, Illinois 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

783
FXUS63 KLOT 162324
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
624 PM CDT Mon Mar 16 2026

.KEY MESSAGES...

- Scattered snow showers and areas of blowing snow will continue
  through this evening leading to localized poor visibility.

- Tonight will be unseasonably chilly with overnight wind
  chills ranging from 0 to locally 15 below.

- A clipper system will bring a period of snow to the area
  Tuesday night into Wednesday morning. Thereafter, a warming
  trend will commence through the end of the week.

&&

.UPDATE...
Issued at 617 PM CDT Mon Mar 16 2026

Have extended the winter weather advisory for blowing and
drifting snow through the remainder of the evening hours. The
strong winds and freshly fallen snow cover continue to lead to
near blizzard conditions being reported in spots in open areas.
We`ve also gotten reports of considerble drifting snow and
refreeze resulting in big problems, mainly on north-south
roadways. While winds will gradually ease this evening, the
threat of hazardous travel conditions in open areas will likely
persist well into the evening hours. In fact, it will likely
become more difficult to spot snow drifted over roadways at
night, increasing the hazard for motorists.

In addition, we will likely continue to snow showers, a few
rather robust, falling out of horizontal convective rolls that
extend back west into Iowa. Any one of the more robust wind
whipped snow showers could result in a quick coating snow in
addition greatly reduced visibility. The snow shower threat
should continue well into the evening hours and perhaps even
after midnight.

Updated grids and text products have been sent.

- Izzi

&&

.DISCUSSION...
Issued at 230 PM CDT Mon Mar 16 2026

Snow showers continue this afternoon across much of the area,
but especially the eastern half of the cwa. Visibilities in
these snow showers have been reported to near zero at times and
opted to issue a winter weather advisory for this potential for
all but the Chicago metro area until 00z. Even outside these
snow showers, northwest winds gusting as high as 40 mph will
also produce areas of blowing and drifting snow. These northwest
winds will slowly diminish during the evening which will allow
the blowing snow threat to also slowly diminish through this
evening.

The snow showers are expected to slowly dissipate in intensity
and coverage by early this evening. However, many of the models
continue to show at least isolated snow showers through late
evening and possibly into the early overnight hours. Have
included slight chance pops for this potential. However, given
how strong these current snow showers are, if snow showers were
to continue tonight, they too would have the potential for brief
low visibility and perhaps some minor snow accumulations.

This potential for snow showers tonight may delay clearing
skies, but some clearing is expected by daybreak, especially
across the northwest cwa. This combined with the fresh snow pack
will allow temps to drop into the low single digits across the
northwest cwa, likely low teens for the rest of the area. Wind
speeds still in the 10 to 15 mph range will allow wind chills to
drop as low as 10 below zero early Tuesday morning.

A clipper system will move across the area Tuesday night
bringing a period of light accumulating snow to the area. There
remains some uncertainty for amounts and the overall trend from
the 12z guidance is for amounts to be a bit lower as the wave
weakens as it moves across the area. Still expecting snowfall
amounts of 1-2 inches but its also possible for some areas to
see under an inch. Looks to be a low qpf, high pop event. The
bulk of the snow should be over by daybreak Wednesday, but some
lingering snow is possible Wednesday morning, especially across
northwest IN. Temps are expected to be slowly warming into the
mid 20s by daybreak Wednesday, but with temps below freezing and
the snow falling at night, untreated surfaces are expected to
become snow covered and slippery.

Another weak wave moves southeast across the area late Wednesday
night into Thursday morning and may produce some light qpf,
especially over Lake Michigan and into northern IN and southwest
MI. Temps by this time look to be around or just above freezing.
Thus anything that does fall, looks to be mainly rain.
Confidence is also low with this potential and trends will need
to be monitored.

An overall warmer pattern is expected for the end of the week
and the weekend. Though there will be a cold front late Friday
afternoon into Friday night that could turn temps cooler,
especially near Lake Michigan. Then a second, stronger cold
front may move across the area Saturday night or early Sunday
morning, with temps returning to near normal or below normal
Sunday into Monday. cms

&&

.AVIATION /00Z TAFS THROUGH 06Z WEDNESDAY/...
Issued at 624 PM CDT Mon Mar 16 2026

Isolated to scattered SHSN with primarily VFR visibility and
ceiling are expected through the early overnight hours. However,
a renewed period of modest cold air advection will result in
increased intensity with intermittent MVFR visibility and
ceilings mid to late evening. Expect ceilings to scatter after
the snow and through Tuesday morning before redeveloping into a
low-end VFR BKN stratocumulus deck during the afternoon and
evening. A few flurries cannot be ruled out during the
afternoon, but cloud depths appear too shallow to support
precip. Finally, light SN is expected to bring IFR visibility
and accumulations up to one inch just after the TAF period
(06-12Z Wednesday).

NW winds will continue to gust in excess of 25 knots through
this evening, then gradually subside to 10 to 15 knots
overnight. Winds will back SW around 10 knots Tuesday afternoon
and SSW 10-15 knots Tuesday evening.

Kluber

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...Winter Weather Advisory until midnight CDT tonight for ILZ003-
     ILZ004-ILZ005-ILZ008-ILZ010-ILZ011-ILZ012-ILZ019-ILZ020-
     ILZ021-ILZ023-ILZ032-ILZ033-ILZ039-ILZ105-ILZ106-ILZ107-
     ILZ108.

IN...Winter Weather Advisory until midnight CDT /1 AM EDT/ tonight
     for INZ001-INZ002-INZ010-INZ011-INZ019.

LM...Gale Warning until 10 PM CDT this evening for the IL and IN
     nearshore waters.

&&

$$

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